How to feed my iris

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If they are the spring blooming type you can use a water soluable type fert such as 10-30-15 once the flowers fade (follow direction). Give them a good soaking!
This will give them a good boost for next year's display.
The spring blooming iris form small bulbs and they bloom before sending up a small tuff of leaves.
 
Iris will start falling over if you don't fertilize them sometime. They need the calcium, etc for strong stems.
 
I have ...seriously 1000's of blue flag iris. I have never fertilized them. The only time I split them is if I am giving them away ( any one want some? Just pay postage and they are yours)
However, other Iris types, that I have gotten from the very gardeners on this site, I do tend to keep them mulched in and I add compost twice a year. They seem to be doing great!

My blue flag are starting to bloom. Soon I will have a gren and blue sea.
 


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